How to bribe my girlll?

So I see the girl I like on Saturday and she has to write a paper for school and she said motivate me. What's a good way to "bribe" her into writing it. I thought it'd be cute. Hah I mean I offered to let her do whatever she wanted to me but I don't know it's kinda of a shitty bribe lol. Anything. Like I'll buy her shit idc. Idkkk. Help!!